CDC Updates Respiratory Illness Data on November 13: Activity Low but Increasing, With Flu Rising in Many Areas
The U.S. Centers for Disease Control and Prevention updated its Respiratory Illnesses Data Channel on November 13, 2026. The latest data show that the amount of acute respiratory illness causing people to seek health care in the United States is low but increasing.
By virus, seasonal flu activity continues to increase in many parts of the country. Respiratory syncytial virus activity is low in most areas of the country, and COVID-19 activity is low nationally.
The CDC also reported that rhinovirus/enterovirus and respiratory adenovirus are elevated nationally, with respiratory adenovirus increasing in some regions of the country.
The data channel brings together emergency department visits, laboratory testing, wastewater surveillance and hospitalization reporting. It is maintained by the National Center for Immunization and Respiratory Diseases, and the data are preliminary and may change as more reports are received.
The CDC said it will continue to update respiratory illness activity levels weekly. This is a follow-up report: compared with earlier flu-only figures, the November 13 update provides a combined assessment of flu, respiratory syncytial virus and COVID-19 activity.
Source: U.S. Centers for Disease Control and Prevention
Published by GSM · USA (original Chinese edition)
Photo: 图：甲型流感病毒的透射电子显微镜图像。来源：CDC / Dr. Erskine Palmer，公共领域。 / Photo: Transmission electron micrograph of influenza A virus. Credit: CDC / Dr. Erskine Palmer, public domain, via Wikimedia Commons.
